2021 Jeep Wrangler Collision Avoidance Problems

Which parts fail

• Adaptive cruise control
  8
• Warnings
  7
• Automatic emergency braking
  7
• Blind spot detection
  4
• Camera system
  2
• Assist
  1

Components named in complaints (automatic emergency braking, adaptive cruise, lane keeping, backup camera).

Mileage when the problem started

Owner reports

Selected complaints filed with NHTSA by 2021 Jeep Wrangler owners, lightly cleaned up (personal details are redacted by NHTSA).

I have a 2021 Jeep Wrangler 4XE Rubicon. My vehicle has been recalled three times for updates. I have had one recall done for the defroster due to the faulty software that can cause reduced visibility increasing a risk of a crash. The second one was for risk of fire from a faulty high voltage battery driving or parked. The third recall call was to update software for the high voltage battery in which doing so caused my vehicle not to fully charge and to lose power when driving and not be able to start for hours at a time. I now have brought my vehicle back to the Jeep service center for a diagnostic test and it was found that the high voltage battery pack is faulty in which Jeep has said they will put a new battery in once approved from Chrysler. …

Two issues that I want to make known. First is a classic jeep issue with the death wobble. I currently have the jeep back in the shop for the current recall and having them fix the wobbling again. This would be the second time that it has happened. worried because the warranty is about to expire. Next is a problem that I almost forgot about until recently because I started driving a rental jeep wrangler. With my jeep, when I have the adaptive cruse control on, it some times thinks there is a car in front of me when it is in the next lane, and right in the middle of the highway, my jeep tries to stop because there is a car next to me in its own lane. This has been going on for a while now but i have never gotten it looked at because of the cost. …

Earlier this year vehicle would sometimes do the following, not at start up but when driving; Wipers on by themselves & driver can't shut off, turn signals inop, Both sides blind spot warning continously on alerting driver every time a vehicle on either side is passed or passes vehicle, anywhere from three to five dash warning lights illuminated. Took to dealer in April 2023 & diagnosed a bad can bus connector. Replaced connector (approx $700). Seemed to be the fix until it started again June 2023. This time all the above issues started up again including loss of power steering. I was on I70 at highway speeds in rush hour traffic and it was very dangerous. Returned to dealer yesterday 6/29/23 Immediately following loss of power steering while vehicle was displaying faults & they read codes. They are booked for 2 weeks so I'm scheduled to drop it off 7/10/2023. …

I was driving down the highway when the engine on my Wrangler 4xe suddenly shut off forcing me to cut off traffic to get to the shoulder. Numerous error messages were displaying but I did not have time to see them all. Final message I could see was "Charging System Error". After turning the Jeep off then back one the problem cleared. I suspect this was caused by the Adaptive Cruise Control system. It had started to brake hard for a car not actually in my lane. At the same moment people were pulling in behind me to move over for a police car on the shoulder. The Adaptive Cruise Control started what was a hard brake check on this traffic, so I overrode it by pressing on the accelerator, at which point it died. At the dealer they determined from the codes that the transmission control unit had shut off the engine control unit. …

Purchased this vehicle used from Chrysler Dodge Jeep in Mesa, Arizona. I was told the tires were newer and in great shape they looked to have a good amount of tread on them. However, I had an issue with one tire and the dealership patched it incorrectly making it a safety hazard Therefore they replaced one tire with the plug and when I went to a tire place for pressure issues and TPS sensor they pointed out the tires were over five years old which means these were the original tires that came with the Jeep in 2021. After only owning this vehicle for two months, I now have to replace all four tires Because there is a safety issue with the age and the tread. There was also issues with the steering damper, which they did repair due to wobbling, however there is a slight wobble still because I have one brand new tire from the dealer and three tires that are not new. …

Hi the two major issues that need to reported. 1. The vehicle would just shut down while driving at highway speeds. It would have trouble restarting and you would have to cost to the shoulder. This issue was random, we took it to the dealership and they drove it for a week until it left them on the side of the road. They kept it for just over a month and a star case had to be opened. 2. 2nd issue, The vehicle would shutter when accelerating and would shutter when braking. Extremely dangerous when trying to drive it back to the dealership. It had something to do with the vehicle not knowing if it wanted to be in electric or gas. this also caused the ac to stop working and the blind spot system not to work . This time they had it for just over a month to change the main battery. Both case the vehicle was unsafe to be on the road and could have led to a major accident.

I had the most recent incident driving Westbound in the evening hours shortly before Sunset around October 10, 2024. It appears the sunlight from the setting sun triggered my adaptive cruise control and forward collision alert and triggered an alarm sound and activated emergency braking at the same time. I have had two previous incidents like this. One at the exact same location on my commute home at around the same time and maybe a week before. A third occurrence was on an Eastbound morning drive with the rising sun. All three incidents triggered emergency braking from a speed of ca. 65mph. I was able to react fast enough to deactivate the ACC by lightly pushing the brake pedal and could avoid serving or complete stopping of the vehicle. Luckily during all incidents I had no close traffic behind me, otherwise the incidents could have caused a rear end collision.

I was driving down the freeway, came upon traffic which caused me to come to a stop. When the traffic cleared and I put my foot on the gas, the jeep refused to go forward and stalled out. I had just enough power to get to a safe area on the side of the freeway. My jeep flashed the D on the gear shifter and I got a notification to put the car in "park." On the control panel screen it showed "check charging system" and "check transmission." It also showed a message showing blind spot alert was disabled and the battery light. I had nearly a full tank of gas when this happened and at least 34% of electric left to drive on electric mode when this occurred. My Uconnect app showed the message "charging fault error has occurred" when this happened on the freeway.

I was driving 72 miles per hour on 4 lane highway and the steering wheel and front end of the jeep was vibrating uncontrollably. The cruse control stopped working, i applied the brake and was able to slow down and pull over to the side of the road. No flat tires so I pulled back on to the highway and arrived at my destination without further incident. 10-24-25 The same thing happened last week but i thought maybe the lane assist went off because there were no road lines (newly repaved road) but my Jeep doesn't have lane assist. After researching on line I believe what occurred is what they call "Death wobble" there were no bumps in the road - the road is in good condition so I'm not certain what prompted the death wobble.

While stopped at a light on a busy highway I heard a loud sound similar to the automatic emergency braking system engaging. When the light changed the vehicle would not move. I tried turning it off and then back on again with no luck. The dash displayed the message "service charging system" and then ultimately illuminated an icon for the 12V battery and the charging system. I wound up having the vehicle towed to a local dealer where it currently remains waiting to be repaired. My biggest fear here is that there was no way to move the vehicle, some type of limp mode would be a much better solution so at least I could have moved out of traffic.

Related recalls

Collision Avoidance complaints in other Wrangler years